肠道菌群导致卵巢切除小鼠骨髓内铁死亡的研究
Gut microbiota causes ferroptosis in the bone marrow of ovariectomized mice
  
DOI:10.3969/j.issn.1006-7108.2024.05.004
中文关键词:  肠道菌群  骨质疏松症  炎症  铁死亡·
英文关键词:gut microbiota  osteoporosis  inflammation  ferroptosis
基金项目:国家自然科学基金(82002279);浙江省自然科学基金(LGF22H060014);浙江省科技厅项目(LGF19H070004);温州市科技局项目(Y2020009)
作者单位
谭曾林1 曾菁菁2 刘建纬3 边若瑜4 陈雷1* 1温州医科大学附属第一医院骨科浙江 温州 325000 2温州医科大学宁波院区浙江 宁波 325000 3温州医科大学基础医学院浙江 温州 325000 4温州医科大学浙江 温州 325000 
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中文摘要:
      目的 探讨肠道菌群是否激活骨髓内铁死亡引发绝经后骨质疏松症 (postmenopausal osteoporosis, PMOP)。方法 通过Micro-CT分析正常组及卵巢切除(ovariectomy, OVX)组小鼠的股骨结构;通过16S rRNA测序分析小鼠的肠道菌群结构;提取小鼠回肠、结肠和股骨的RNA及蛋白,并检测其中炎性因子、紧密连接蛋白及铁死亡相关因子的表达水平;利用试剂盒检测股骨中丙二醛、还原型谷胱甘肽及组织铁含量。结果 OVX组小鼠肠道菌群的物种多样性及丰富度显著增加,引起OVX小鼠肠道屏障功能受损。肠道屏障功能的受损引起骨髓的炎性反应及铁死亡的发生,最终导致了PMOP的发生发展。结论 肠道菌群能够通过促进OVX小鼠骨髓炎症及骨髓内细胞铁死亡引起PMOP。
英文摘要:
      Objective To explore the mechanism of postmenopausal osteoporosis (PMOP). Methods The femoral structure of normal group and ovariectomized (OVX) mice were analyzed using micro-CT. The gut microbiota structure of mice was analyzed with 16S rRNA sequencing. RNA and protein were extracted from the ileum, colon and femurs of mice. The expression levels of inflammatory factors, tight junction protein, and ferroptosis related factors were detected. In addition, the content of malondialdehyde (MDA), reduced glutathione (GSH), and tissue iron (Fe) in femurs were detected with the kits. Results The species diversity and richness of gut microbiota in OVX mice significantly increased, which resulted in the impairment of intestinal barrier function in OVX mice. The damage of intestinal barrier function caused bone marrow inflammation and ferroptosis, which eventually contributed to the occurrence and development of PMOP. Conclusion Gut microbiota induced PMOP by promoting bone marrow inflammation and ferroptosis in OVX mice
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